Took a shot at this, hope I did this right.
This event concerns the Church of Gan, lord of the underworld, connector of the dead and god who ensures all souls pass over to the afterlife. His servants dig the graves of the deceased, unless he is appeased and refuses to allow them to cross the barrier between the living and the dead.
But when he isn't guarding the thin line between this life and the one beyond it, he gets up to his own ends. You find out about this one day when you discover rumors in a tavern situated along a lonely stretch of road.
Part one - Rumors
Wanders will know this inn well. The Marksman Inn serves fine ale and hosts warm beds for travelers to rest between trips. Players must enter the inn and buy an ale from the bartender, then give to the bartender when he says he isn't busy. It will take several beers to get him to open up about a factoid of a skull stone.
The bartender will tell you-- somewhere in the forest lies a stone with the face of a skull carved into it.
Skull, you ask?
Yes, he continues. The skull was carved by dedicated monks who served him before the world's previous caticlysm. Before Urath came into the age it's in now, there were monks who carved skulls into stones in the forest to mark neary temples, in case the caves the temples were built in collapsed. Due to the earthquakes of the previous age, many temples were buried and their knowledge was lost.
The user will thank the bartender. Their next mission is to find the stone with a skull carved into it.
Part two - search for the stone
The stone isn't easy to find.
You must examine rocks scattered throughout a forest in order to find the skull rock. Then, search around for rock foundation, and dig. Dig downwards, not up. The ruins will not be close to the top.
Miners know well of the threat of caves collapsing when digging. Players may risk losing their lives if they can't dig safely while searching for the ruins.
The hidden tunnel leading to the ruins/temple will reveal itself by the telltale signs of statues and alters hidden underneath. Players may also encounter a fountain. But above all, they'll encounter an old monk--now dead. Now searching for fresh blood.
Part three - fighting off the undead
The problem with undead monks isn't the strength of one. The problem is they spawn in groups. If players go in the temple alone, they may very well die trying to cut a path through the mob in search of treasure. Fighters may realize this too late in their lust for gold.
Players are advised to go in groups. It might be another problem altogether to do so, depending on how greedy group members are to get to the treasure...
When all monsters are dead, a chest will appear after so many are slain. The cave will remain open afterwards for those who want to descend into it to level their fighting skill, but the treasure chest will spawn ONLY once. Rare items can be expected when the chest is opened.
Part four - do you want to follow Gan?
There's one more thing in the ruins players will notice. In the back towards an altar will be an open book on a pedestal. Upon reading the inscription will be Gan's statement and the request to follow him. To follow Gan is to respect death and revere it, for death is what keeps order in the world above all else. To follow Gan is to also uncover the secrets of necromancy.
Players may accept Gan as their god. With a high enough level in faith for priesthood, they can learn necromancy and use the power to summon the spirits of monks... under the promise that one day, they may find themselves among the undead army too.